Stone-breaking and ore-crushing machine



(No Model.) 2 Sheets-'-Sheet 2. v

R. D. GATES.

R N I H G A M G N T. H S U R G E R 0 D N A G N I K A B R B M 0 M 8 5 2 n N Patented Dec. 20,1881.

m M W? Jaw M M 4M m w UNITE STATES PATENT OEEIeE.

RYERSON I). GATES, OF CHICAGO, ILLINOIS.

STONE-BREAKING AND ORE-CRUSHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 251,040, dated December 20, 1881. Application filed September 7, 1881. (No model.)

.To all whom it may concern V Be it known that I, RYEnSoN D. GATES, a citizen of the United States, residing at; Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Stone-Breaking and Ore-Crushing Machines, ofwhich the following is a specification.

My invention relates specially to an improvement in the conical crusher-head which is applied to the upright crusher-shaft of stone breakers and erushers, but may be applied to other styles of crusher-heads; and the nature of my invention consists, first, in a crusherhead wherein hard-metal sections provided with tongues and recesses adapted to the form ofelamping-bolts are combined with a flanged base portion provided with depressions and recesses, also adapted to the form of clampingbolts, and a cap and clatnpii'ig-bolts, as will be hereinafter described; second, in the combination of a crusher-shaft base portion provided with depressions and recesses, with hard-metal sections having tonguesand depressions, a beveled cap, and clamping-bol s, as will be hereinafter described.

The crushing-head of stone-breaking machines such as that shown in Letters Patent No. 243,545 has heretofore been cast in one solid hard-metal piece, and then fastened to the shaft by means of Zinc run between the head and shaft; and when the head is worn out and it requires to be renewed, or when it is desired to put on a larger or smaller head in order to crush finer or coarser, it is usually necessary to take the shaft entirely out of the machine, turn it upside down, bury the crusher-head in the ground, build and keep a fire around it until the zinc which fastens the head to the shalt is melted, then take oftthe head,put on the new or larger or smaller one, true it up, fasten it with zinc, and then replace the shaft and head in the stone-breaker. This operation is very bothersome, and in cases where the shaft and head weigh four thousand five hundred pounds it takes a great deal of time and labor, which involves considerable expense, and nearly all of which my improvement avoids.

In the accompanying drawings, Figure 1 is a vertical central section of the upper portion of a stone-breaker with my improvement applied to it. Fig.2 is ahorizontal section of the improved CltlSllI'-l.lGld in the line mm of Fig. 1;

A is an ordinary shaft of a crusher-head. It

has, as usual, a polygonal form in horizontal section at the line or 00, and is provided with grooves a for the reception of zinc, which is flowed into the grooves for the purpose of fastening the crusher-head to the shaft.

B and 0 represent my improved crusherhead, applied and fastened to the shaft. A by zinc rings b. The part B has grooves a formed in it at points opposite the grooves a of the' shaft, and the fluid zinc is flowed into these grooves in the ordinary manner and allowed to become set. The said part B is what I term a false head or base, and it is made of soft or other suitable metal, and it is not to be removed from the shaft when the working or face portions 0 are removed for any cause. This partB is in form of a hollow pyramid, and is provided with a broad circular tlange, c, at its bottom; and in its flat tapering sides are tapering grooves or depressions (1, having beveled bottoms c, as shown. The depressions d are inclined or vanishing at their front edges and straight 011 their backsthat is, their back surfaces are parallel with the axis of the shaft A,while their front edges are on lines corresponding with the tapering sides of the pyramidical part B, and in these back surfaces recesses (1, corresponding respectively to the form of one-halfof the body and head ofa bolt, D, are formed. The depressions d vanish, so as to have no depth beyond the recesses for the screw-bolts, i'n terminating at the top of the pyramidical part B.

The portion 0 of the crusher-head consists of a number of segmental pieces of hard or chilled metal. The outer surfaces of these pieces are segments of circles, and these surfaces are corrugated, and the inner surfaces or back sides of said pieces are flat, except at the places where tapering and recessed tongues f are formed on them, as shown. The flat surfaces and tongues f of the pieces correspond substantially with the flat surfaces and depressions (111 ofthepyramidical part B of the crusher-head, and thus when the pieces 0 are made to form a circle around the part B their radial edges gwill adjoin, while their flat back surfaces and their tongues match the flat sides and depressions of the part B, and the recesses of the tongues partly receive the bodies and heads of the bolts D into them, as illustrated in the drawii'igs.

The meeting surfaces of the portions B and C may be backed up with zinc or Babbitt 'metal. as at g, if deemed necessary.

E is a circular cap, made. flat, as at h, and tiaring and concave, as at h, on its under side, in order to fit the horizontal end of the part B and the beveled upper ends, 7L2, of the segmental pieces 0, as shown. This cap has an opening in its center, which allows it. to pass over the shaft, and it also has holes in it, which allow it to pass down over the screws. By adj usting this cap over the shaft and screw-bolts and down upon the portions B and O, and then screwing down nuts 1' upon the ends of the bolts, the segments C will be firmly held in place upon the part B. By simply removing the cap E the segments can be removed and others substituted for them, the removal of the part B and shaft A from the machine being wholly unnecessary. The heads of the bolts, where they enter the tongues of the segments G, are partly cut away in order to avoid weakening the s gments.

I have represented in the drawings an adjustable concave; but the same is not claimed under this application, but will form the subject-matter ofanoth er patentapplied for by me.

The base portion B, with grooves and recesses in its outer surface, might be cast, with the shaftA, out ofsteel, or even good iron,without materially departing from my invention, and without destroyingits utility for crushing some, materials; and instead of uniting the base portion B to the shaft A by rings ot'zinc flowed in between it and the shaft A, the base portion might be united to the shaft by means of a key or pin passed through the shaft at top of crusher-head; or it might be fastened to the shaft in various ways without departing from my invention.

Previous to my invention the grinding and breaking surfaces of meal, bone, bark, and cob or grain mills have been constructed in detachable parts and applied upon or against a basesupport, but in such constructions the parts were not formed and united so as to be practically adapted for the hard work of breaking stone and crushing ore; and the improvements which I have made in such constructions have special reference to the performance of such work, and to that end I have made the base or foundation portion B of the head with'the peculiar formation of recesses shown in the drawings, and formed on the segmental sections of crushing-surface of the head peculiar projections for fitting said recessess, and,in ad-' dition to the recesses and tongues, I have provided partly-headed binding-bolts and a clampingcap, which, in conjunction with bottom rests for the segmental sections, serve as means whereby the several parts of the crusher-head can be united almost as firmly and compactly as one solid mass, and yet can at will be separated for the purposes set forth in my aforegoing specification.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a crusher-head for stone and ore crushing machines, the combination of the hard-metal sections 0, provided with the tonguesfand recesses adapted to the form of the clampingbolts, with the flanged base portion B, provided with depressions d and recesses (I, also adapted to the form of the clamping-bolts, the

cap E, and clamping-bolts D, substantially as and for the purpose described.

2. The combination of crusher-shaft A, base portion B, provided with depressions d and recesses d, with segmental hard-metal sections 0, having tonguesf and depressions adapted to the form of the clamping-bolts, cap E, beveled on its under side, and clamping-bolts D, substantially as and for the purpose described.

BYERSON D. GATES.

\Vitnesses:

GEO. VAN ZANDT, JAs. W. Soovrnnn. 

